![](https://webarchive.library.unt.edu/dentonfracking/20141113214949im_/http://media.npr.org/assets/img/2014/10/24/colors-2-_wide-e0109b1a9e541fa25d3130b682c88ee70846439a-s1000-c15.jpg)
Surprise! Not one of these things contains a single speck of blue pigment.Evan Leeson/Bob Peterson/lowjumpingfrog/Look Into My Eyes/Flickrhide caption
Advocates of computed tomography screening say it can catch cases of cancer in high-risk smokers before it spreads, as in this 79-year-old man.Cavallini James/BSIP/Corbishide caption
Ouch! Jeffrey Craig Hopper got good emergency treatment after being hit in the eye with a baseball in June. But months later he was slapped with an extra medical bill he never expected.Jennifer Hopperhide caption
A nurse adjusts the position of a patient's arm during dialysis treatment. The treatment requires trained staff that weren't readily available in the aftermath of Hurricane Sandy. Michael Donne/Science Source hide caption
Premature infants in a neonatal intensive care unit may be exposed to DEHP, a chemical in some PVC medical equipment. ERproductions Ltd/Blend Images/Corbis hide caption
Helmets? Way to avoid traumatic brain injury, guys. Kevin Dodge/Corbis hide caption
Surprise! Not one of these things contains a single speck of blue pigment. Evan Leeson/Bob Peterson/lowjumpingfrog/Look Into My Eyes/Flickr hide caption
Advocates of computed tomography screening say it can catch cases of cancer in high-risk smokers before it spreads, as in this 79-year-old man. Cavallini James/BSIP/Corbis hide caption
Ouch! Jeffrey Craig Hopper got good emergency treatment after being hit in the eye with a baseball in June. But months later he was slapped with an extra medical bill he never expected. Jennifer Hopper hide caption
This is a re-creation of a color plate from Interaction of Color, by Josef Albers. The two X's are are exactly the same — it's the different backgrounds that make them look like very different colors. Source: Josef Albers Interaction of Color hide caption
A nurse at the University of California Medical Center in San Francisco protests lack of Ebola preparedness in October. The issue will be the focus of national demonstrations Wednesday. Justin Sullivan/Getty Images hide caption
Look no farther for the top things to watch out for when shopping for health insurance on the online marketplaces. Giorgio Magini/iStockphoto hide caption
When Dad is the one who gets pregnant, the whole process of pregnancy and childbirth gets a lot more complicated. Inti St. Clair/Ocean/Corbis hide caption
Time for a replay?: Protesters waited outside the Supreme Court for decisions in June. J. Scott Applewhite/AP hide caption
A survey of more than 400 doctors asked how electronic medical records had affected their free time on the job. The answers weren't pretty. NPR hide caption
Middle Eastern Respiratory Syndrome virus particles cling to the surface of an infected cell. NIAID/Flickr hide caption
Which flu vaccine should you get? That may depend on your age and your general health. Joe Raedle/Getty Images hide caption